var articlebox = {
    current:0,
    open:function(_index){
        pi.util.Element.removeClass(pi.get("article_"+this.current),"Visible");
        pi.util.Element.addClass(pi.get("article_"+this.current),"Hidden");
        pi.util.Element.removeClass(pi.get("articleLink_"+this.current),"Selected");
        this.current = _index;
        pi.util.Element.addClass(pi.get("article_"+this.current),"Visible");
        pi.util.Element.removeClass(pi.get("article_"+this.current),"Hidden");
        pi.util.Element.addClass(pi.get("articleLink_"+this.current),"Selected");
    }
}